In addition, the BLT connection allows you to use the unit as a monaural amplifier with the rated output of 600 W (8Ω).

Large-capacity super-regulation power transformer

The high-performance EI type super-regulation transformer is placed on the power supply unit to support the high power of M-900u with the aim of eliminating the loss of space, minimising the capacity between lines, reinforcing the unifying force, stabilising the magnetic field, and more by winding the flat-type copper coil tightly.

The regulation performance that is not affected by any load fluctuation is achieved owing to the large capacity of as much as 1,250 VA.

Thoroughly low impedance transmission

To provide the power of the heavy-duty power supply circuit supplied from the large-capacity block capacitor of 20,000μFx4 to the amplification circuit instantaneously without any loss, the main electric current line between the power supply unit and output stage is directly connected by hardwiring using a extremely thick OFC bus bar.

What’s more, to transmit the powerful drive force generated by the large-scale output circuit without loss, the large-capacity speaker relay with low resistance in which 4 contacts are connected in parallel is equipped.

The overwhelming value of the damping factor, that is 710, has been achieved.

Large needle meter that shows how the sound really moves

A large-scale needle-type meter is introduced to provide not only audible sensation but also physical sensation for the lively feeling of sound.

The electric bulb colour of the LED illumination is the result of Luxmans persistence in visibility.

The meter is equipped with the ON/OFF switch for operation and the ON/OFF switch for illumination.

For M-900u, up to 12 W of the output is operated with pure class A.

In this case, the meter reads -10 dB or so, and the inclusion of almost all of the ordinary volume range balances between high power and dense sound quality with pure class A.

Highly rigid chassis structure supporting heavy parts

A stray current in the chassis generated by the ground loop may cause the deterioration of sound quality such as increase in impedance and magnetic field generation.

To prevent this, M-900u uses the loopless chassis that does not have a ground loop.

The gradation cast-iron is used for the legs to shut off external vibrations and relieve internally generated vibrations.

The chassis has a structure to hold heavy parts firmly and an appearance to show overwhelming presence and to be covered with blasted white neatly, which leads to the combination of strong and calm design.

Specifications M-900u

Rated output

Speaker terminal Supported Y-lug terminal dimension

Instantaneous max. output

1,200W + 1,200W (1Ω)/at stereo 2,400W (2Ω)/at monaural

Input sensitivity

1.24V/150W (8Ω) GAIN 29.0dB

Input impedance

Unbalanced 51 kΩ Balanced 34 kΩ

Frequency response

20Hz to 20kHz (+0, –0.1dB) 1Hz to 130kHz (+0, –3.0 dB)

Total harmonic distortion rate

0.008% or less (1kHz/8Ω) 0.1% or less (20Hz to 20kHz/8Ω)

S/N ratio (IHF-A)

117dB

Amplification circuit

ODNF 4.0

Output configuration

Bipolar 4-parallel push-pull x 2

Power transformer

EI type 1,250VA

Damping factor

710

Power consumption

540W 280W (under no signal) 1.0W (at standby)

External dimensions

440(W) x 224(H) x 485(D) mm front side knob of 2mm and rear side terminal of 38 mm included in depth

Net weight

48.0kg

Accessories

Dedicated remote cable, Power cable

Speaker terminal Supported Y-lug terminal dimension

Width of part a: 14mm or less Width of part b: 7mm or more
* Connection may not be performed depending
on the shape of the Y-lug terminal.